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sdb
Guest
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 Posted: Sun Nov 09, 2003 8:26 pm Post subject: Removing FocusRect |
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Hi,
I found this code in the archives. Can I modify it to remove the focus
rectangle from a (clicked) TBitBtn owned by my TCustomControl-derived
component?
I'm unsure how to intercept messages for owned components. Also, where do
you find a list of these messages (eg CN_DRAWITEM)? I can't locate them in
the help files.
Thank you,
Steve (BCB5/WinXP)
---
You can't modify the TOwnerDrawState from inside the DrawItem() method. As
you already noted, it's passed by value. The only way to do what you're
asking for is to use a MESSAGE_MAP to intercept the CN_DRAWITEM message
directly in yuor component, then you can modify the information before
passing it to TCustomListBox for it's default processing:
class TMyListBox : public TCustomListBox
{
private:
void __fastcall MyCNDrawItem(TWMDrawItem &Message);
public:
BEGIN_MESSAGE_MAP
VCL_MESSAGE_HANDLER(CN_DRAWITEM, TWMDrawItem, MyCNDrawItem)
END_MESSAGE_MAP(TCustomListBox)
};
void __fastcall TMyListBox::MyCNDrawItem(TWMDrawItem &Message)
{
Message.DrawItemStruct->itemState &= ~ODS_FOCUS;
TCustomListBox::Dispatch(&Message);
}
Gambit
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Todd Brylski
Guest
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| Posted: Mon Nov 10, 2003 8:01 am Post subject: Re: Removing FocusRect |
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"sdb" <lkjh12 (AT) hotmail (DOT) com> wrote
| Quote: | remove the focus rectangle from a (clicked) TBitBtn
owned by my TCustomControl-derived component?
|
In your custom control class implement the following:
virtual void __fastcall WMDrawItem( TMessage& Message )
{
if( (HWND)Message.WParam == BitBtnPtr->Handle )
{
((LPDRAWITEMSTRUCT)Message.LParam)->itemState &= ~ODS_FOCUS;
}
TCustomControl::Dispatch(&Message);
}
BEGIN_MESSAGE_MAP
VCL_MESSAGE_HANDLER(WM_DRAWITEM, TMessage, WMDrawItem)
END_MESSAGE_MAP(TCustomControl)
Todd
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Guest
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| Posted: Wed Nov 12, 2003 12:25 am Post subject: Re: Removing FocusRect |
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"Todd Brylski" <tbrylski (AT) yyaahhoooo (DOT) com> wrote
| Quote: | "sdb" <lkjh12 (AT) hotmail (DOT) com> wrote
remove the focus rectangle from a (clicked) TBitBtn
owned by my TCustomControl-derived component?
In your custom control class implement the following:
virtual void __fastcall WMDrawItem( TMessage& Message )
{
if( (HWND)Message.WParam == BitBtnPtr->Handle )
{
((LPDRAWITEMSTRUCT)Message.LParam)->itemState &= ~ODS_FOCUS;
}
TCustomControl::Dispatch(&Message);
}
BEGIN_MESSAGE_MAP
VCL_MESSAGE_HANDLER(WM_DRAWITEM, TMessage, WMDrawItem)
END_MESSAGE_MAP(TCustomControl)
Todd
|
Sweet! Thanks Todd. Your code led me to try the following, which also
worked.
void __fastcall TMyComponent::WMDrawItem( TWMDrawItem& Message )
{
if( Message.Ctl == BitBtnPtr->Handle )
{
(Message.DrawItemStruct->itemState &= ~ODS_FOCUS;
}
TCustomControl::Dispatch(&Message);
}
BEGIN_MESSAGE_MAP
VCL_MESSAGE_HANDLER(WM_DRAWITEM, TWMDrawItem, WMDrawItem);
END_MESSAGE_MAP(TCustomControl)
Thanks again,
Steve
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Guest
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| Posted: Wed Nov 12, 2003 3:47 am Post subject: Re: Removing FocusRect |
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"Todd Brylski" <tbrylski (AT) yyaahhoooo (DOT) com> wrote
| Quote: | "sdb" <lkjh12 (AT) hotmail (DOT) com> wrote
remove the focus rectangle from a (clicked) TBitBtn
owned by my TCustomControl-derived component?
In your custom control class implement the following:
virtual void __fastcall WMDrawItem( TMessage& Message )
{
if( (HWND)Message.WParam == BitBtnPtr->Handle )
{
((LPDRAWITEMSTRUCT)Message.LParam)->itemState &= ~ODS_FOCUS;
}
TCustomControl::Dispatch(&Message);
}
BEGIN_MESSAGE_MAP
VCL_MESSAGE_HANDLER(WM_DRAWITEM, TMessage, WMDrawItem)
END_MESSAGE_MAP(TCustomControl)
Todd
|
Sweet! Thanks Todd. Your code led me to try the following, which also
worked.
void __fastcall TMyComponent::WMDrawItem( TWMDrawItem& Message )
{
if( Message.Ctl == BitBtnPtr->Handle )
{
Message.DrawItemStruct->itemState &= ~ODS_FOCUS;
}
TCustomControl::Dispatch(&Message);
}
BEGIN_MESSAGE_MAP
VCL_MESSAGE_HANDLER(WM_DRAWITEM, TWMDrawItem, WMDrawItem);
END_MESSAGE_MAP(TCustomControl)
Thanks again,
Steve
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Rodolfo Frino - Macrosoft
Guest
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| Posted: Fri Dec 19, 2003 2:57 pm Post subject: Re: Removing FocusRect |
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In addition to what Todd said, have a look at this article:
http://www.geocities.com/rodolfofrino/KillFocus.html
"The Universe, as a whole, is a place without outdoors". Rodolfo, 2003
<sdbeames (AT) hotmail (DOT) com> wrote
| Quote: |
"Todd Brylski" <tbrylski (AT) yyaahhoooo (DOT) com> wrote in message
news:3faf45d1$1 (AT) newsgroups (DOT) borland.com...
"sdb" <lkjh12 (AT) hotmail (DOT) com> wrote in message
news:3faea308 (AT) newsgroups (DOT) borland.com...
remove the focus rectangle from a (clicked) TBitBtn
owned by my TCustomControl-derived component?
In your custom control class implement the following:
virtual void __fastcall WMDrawItem( TMessage& Message )
{
if( (HWND)Message.WParam == BitBtnPtr->Handle )
{
((LPDRAWITEMSTRUCT)Message.LParam)->itemState &= ~ODS_FOCUS;
}
TCustomControl::Dispatch(&Message);
}
BEGIN_MESSAGE_MAP
VCL_MESSAGE_HANDLER(WM_DRAWITEM, TMessage, WMDrawItem)
END_MESSAGE_MAP(TCustomControl)
Todd
Sweet! Thanks Todd. Your code led me to try the following, which also
worked.
void __fastcall TMyComponent::WMDrawItem( TWMDrawItem& Message )
{
if( Message.Ctl == BitBtnPtr->Handle )
{
Message.DrawItemStruct->itemState &= ~ODS_FOCUS;
}
TCustomControl::Dispatch(&Message);
}
BEGIN_MESSAGE_MAP
VCL_MESSAGE_HANDLER(WM_DRAWITEM, TWMDrawItem, WMDrawItem);
END_MESSAGE_MAP(TCustomControl)
Thanks again,
Steve
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